Circular brush



FIG. 1 is a perspective top view of a circular brush showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevation view thereof;

FIG. 4 is a bottom perspective view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken lines shown in the drawings are for the purpose of illustrating environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a circular brush, as shown and described. 